Android的工作室未呈现preVIEW [英] Android Studio not rendering preview

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问题描述

我知道这是常见的问题,但我已经试过


  • 清洗和重建项目

  • 无效并重新启动

  • 设置内部版本到其他的22

  • 更改摇篮的版本

  • 添加基础。 styles.xml
    而没有这不会解决问题。

它似乎此时的问题是别的地方,因为所有元件均达到最新

我在Android Studio中的preVIEW屏幕得到以下错误

 以下类找不到:
- android.support.v7.widget.Toolbar

摇篮版本为1.2.3。我刚刚安装的Andr​​oid工作室+ SDK。

的gradle构建:

  //顶级构建文件,您可以添加常用的配置选项,所有分项目/模块。buildscript {
    库{
        jcenter()
    }
    依赖{
        类路径'com.android.tools.build:gradle:1.2.3        //注意:不要在这里把你的应用程序依赖关系;他们属于
        //在单个模块的build.gradle文件
    }
}allprojects {
    库{
        jcenter()
    }
}

 应用插件:'com.android.application    安卓{
        compileSdkVersion 21
        buildToolsVersion '22 .0.1        defaultConfig {
            的applicationIDcom.sth.sth
            15的minSdkVersion
            targetSdkVersion 22
            版本code 1
            的versionName1.0
        }
        buildTypes {
            发布 {
                minifyEnabled假
                proguardFiles getDefaultProguardFile('proguard的-android.txt'),'proguard-rules.pro
            }
        }
    }
依赖{
    编译文件树(包括:['的* .jar'],DIR:库)
    编译com.android.support:appcompat-v7:22.1.1
    编译com.android.support:cardview-v7:21.0.3
    ...
}


解决方案

您正在使用从支持库工具栏,但似乎你不包括它作为一个依赖。你应该添加这样的事情在你的build.gradle文件:

  {相关性
    编译com.android.support:support-v4:22.1.1
    编译com.android.support:appcompat-v7:22.1.1
}

I know this is common question, but I have tried

  • Cleaning and Rebuilding Project
  • Invalidating and restarting
  • Setting build version to other that 22
  • Changing version of Gradle
  • adding Base. in styles.xml and none of this doesn't fix the issue.

It's seems that this time the problem is somewhere else, because all elements are up-to-date.

I am getting following error at the preview screen in Android Studio :

The following classes could not be found:
- android.support.v7.widget.Toolbar

Gradle version is 1.2.3. I have just installed Android Studio + SDK.

Build gradle :

// Top-level build file where you can add configuration options common to all sub-projects/modules.

buildscript {
    repositories {
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:1.2.3'

        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

allprojects {
    repositories {
        jcenter()
    }
}

and

    apply plugin: 'com.android.application'

    android {
        compileSdkVersion 21
        buildToolsVersion '22.0.1'

        defaultConfig {
            applicationId "com.sth.sth"
            minSdkVersion 15
            targetSdkVersion 22
            versionCode 1
            versionName "1.0"
        }
        buildTypes {
            release {
                minifyEnabled false
                proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
            }
        }
    }
dependencies {
    compile fileTree(include: ['*.jar'], dir: 'libs')
    compile 'com.android.support:appcompat-v7:22.1.1'
    compile 'com.android.support:cardview-v7:21.0.3'
    ...
}

解决方案

You're using the toolbar from the support library, but it seems that you aren't including it as a dependency. You should add something like this in your build.gradle file:

dependencies {
    compile 'com.android.support:support-v4:22.1.1'
    compile 'com.android.support:appcompat-v7:22.1.1'
}

这篇关于Android的工作室未呈现preVIEW的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!

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